updated Readme

kalwalt · kalwalt · commit e32e538e1739 · 2021-04-21T21:24:28.000+02:00
diff --git a/README.md b/README.md
@@ -107,17 +107,17 @@ Please follow these simple steps:
     embedded
     arjs="trackingMethod: best; sourceType: webcam;debugUIEnabled: false;"
   >
-    <!-- we use cors proxy to avoid cross-origin problems -->
+    <!-- we use cors proxy to avoid cross-origin problems ATTENTION! you need to set up your server -->
     <a-nft
       type="nft"
-      url="https://arjs-cors-proxy.herokuapp.com/https://raw.githack.com/AR-js-org/AR.js/master/aframe/examples/image-tracking/nft/trex/trex-image/trex"
+      url="your-server/https://raw.githack.com/AR-js-org/AR.js/master/aframe/examples/image-tracking/nft/trex/trex-image/trex"
       smooth="true"
       smoothCount="10"
       smoothTolerance=".01"
       smoothThreshold="5"
     >
       <a-entity
-        gltf-model="https://arjs-cors-proxy.herokuapp.com/https://raw.githack.com/AR-js-org/AR.js/master/aframe/examples/image-tracking/nft/trex/scene.gltf"
+        gltf-model="your-server/https://raw.githack.com/AR-js-org/AR.js/master/aframe/examples/image-tracking/nft/trex/scene.gltf"
         scale="5 5 5"
         position="50 150 0"
       >
@@ -185,10 +185,11 @@ Please follow this simple steps:
     <body style="margin : 0px; overflow: hidden;">
         <a-scene embedded arjs>
         <a-marker preset="hiro">
+            <!-- we use cors proxy to avoid cross-origin problems ATTENTION! you need to set up your server -->
             <a-entity
             position="0 -1 0"
             scale="0.05 0.05 0.05"
-            gltf-model="https://arjs-cors-proxy.herokuapp.com/https://raw.githack.com/AR-js-org/AR.js/master/aframe/examples/image-tracking/nft/trex/scene.gltf"
+            gltf-model="your-server//https://raw.githack.com/AR-js-org/AR.js/master/aframe/examples/image-tracking/nft/trex/scene.gltf"
             ></a-entity>
         </a-marker>
         <a-entity camera></a-entity>
@@ -197,6 +198,11 @@ Please follow this simple steps:
 </html>
 ```
 
+Important! Be aware that if you are referring to external resources, in any app, especially those using NFT, you will encounter CORS problems if those resources are not in the same server of the code. If you can’t see the tracking, please open your Browser Dev Tools and check if you have CORS errors in the console. If so, you have to fix those errors in order to see your content. The correct fix is to place your resources on the same server of your code.
+
+If you cannot do that, you can host a proxy anywhere server to solve that (https://github.com/Rob--W/cors-anywhere).
+Please note that several hosting services have policies that does not permit to use such server. Always check hosting services policies before using them to avoid account suspensions
+
 Learn more on the [AR.js Official Documentation](https://ar-js-org.github.io/AR.js-Docs/).
 
 ## Troubleshooting, feature requests, community
@@ -238,4 +244,3 @@ For legal details, be sure to check [jsartoolkit5 license](https://github.com/ar
 and [AR.js license](https://github.com/AR-js-org/AR.js/blob/master/LICENSE).
 
 Full Changelog: [AR.js changelog](https://github.com/AR-js-org/AR.js/blob/master/CHANGELOG.md)
-
